Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e2120b4b34392a…

MALICIOUS

PDF

47.5 KB Created: 2020-03-07 12:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3b8053e8c563d973a6334579b6170812 SHA-1: ea76257f6fa8ec683b476ab945060ef9efb9404e SHA-256: 31e2120b4b34392af8dd684f39310dee79c594f72b6573dfe6fbbf055cff68da
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that points to a page about 'gestational diabetes pathophysiology', suggesting a lure. The primary attack pattern involves redirecting users to a link farm hosted on multiple domains, likely for SEO poisoning or to distribute further malicious content. No scripts were extracted from this sample.

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://rpgd.stefanaarnio.com/uploads/1/3/0/5/130547286/130547286.html#gestational+diabetes+pathophysiology
    • http://shred805.com/uploads/1/3/0/7/130739886/8147747.pdf
    • http://mariettebasson.com/uploads/1/3/0/7/130776428/davagaselovud.pdf
    • http://zmani.site/uploads/1/3/0/8/130874099/088f0d37cb.pdf
    • http://generalqualitytransportation.com/uploads/1/3/0/5/130540284/nanonezeresotamatofi.pdf
    • http://newyorkcityspeechtherapy.com/uploads/1/3/0/5/130542865/4346409.pdf
    • http://moncrieffekallai.org/uploads/1/3/0/5/130552034/7562003.pdf
    • http://funeral-planning-guide.com/uploads/1/3/0/2/130287839/siriwakivelel.pdf
    • http://trustedservicesgp.com/uploads/1/3/0/5/130589281/gusiziwur.pdf
    • http://thedevyngunshow.com/uploads/1/3/0/7/130776612/gesuwu.pdf
    • http://drbrettagrant.com/uploads/1/3/0/6/130604317/d6ebecddf.pdf
    • http://mesh1nfo.com/uploads/1/3/0/7/130775672/biniselemogop.pdf
    • http://nikoserver.nikocompanies.com/uploads/1/3/0/2/130273766/211993.pdf
    • http://www.koodayta.com/uploads/1/3/0/2/130287872/debetopi.pdf
    • http://www.heatherjulien.com/uploads/1/3/0/6/130620510/ecbc3dd02a3.pdf
    • http://antumbraeducationpartners.com/uploads/1/3/0/6/130621306/piriporagazezile.pdf
    • http://ntro4k.com/uploads/1/3/0/5/130588754/2265389.pdf
    • http://www.elizabethmslocum.com/uploads/1/3/0/2/130271234/gawoz-vanokovewa.pdf
    • http://nobullshitvideos.com/uploads/1/3/0/5/130545745/ce75a1e78.pdf
    • http://www.reflectionsinteriors.co.uk/uploads/1/3/0/2/130272856/xudapivise.pdf
    • http://paymentcardsettlementclaim.com/uploads/1/3/0/2/130291033/082c0195f7.pdf
    • http://mta-sts.mx.dreamcatchermeadow.com/uploads/1/3/0/7/130775675/2017e58ddc7.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008797.bin
46caf5f4c96c91eae99a1fbecdb5cf96764204a2009a39fe03496e1cc3808d02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8797 7796 bytes
font_01_sfnt_off0000a5e3.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 2864 bytes

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